Vulcanizing-mandrel for rubber hose.



No. 897,309. PATENTED SEPT. l, 1908. S. J. SILL.

VULGANIZING MANDREL FOR RUBBER HOSE.

APPLICATION FILED JAN. s, 1908.

UNITED STATES PATENT OFFICE.

SAMUEL J. SILL, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO HERBERT H.HEWITT, OF BUFFALO, NEW YORK.

VULGANIZING-MANDBEL ron RUBBER HOSE.

Specification of Letters Patent.

Patented Sept. 1, 1908.

To all whom it may concern.

Be it known that I, SAMUEL J SILL, a citizen of the United States,residing at Buffalo, county of Erie, and State of New York, haveinvented certain new and useful Improvements in Vulcanizing-Mandrels forRubber Hose, of which I do declare the following to be a full, clear,and exact description, reference being had to the accompanying drawing,forming part of this speclfication.

The present invention has for its obj eat to provide an improvedconstruction of mandrel for sustaining sections of rubber hose duringthe vulcanizing operation.

The object of the invention is to provide a mandrel of simple andeffective construction which will determine with exactness the length ofthe hose section and which will also give the desired square finish tothe ends of the hose section.

In the drawings, Figure 1 is a view in elevation of the improved mandrelwith a hose section thereon and with its removablecap detachedtherefrom. Fig. 2 is a similar view partly in section and with theremovable cap in position. Fig. 3 is a detail section on line 33 of Fig. 4. Fig. 4 is a detail section on line 4 4 of Fig. 2.

The body 1 of the mandrel is ahollow tube of iron or steel and at oradjacent one of its ends is fixed a collar 2, this collar being held inposition as for example by a rivet 3 that passes through the collar andthrough the mandrel. The op osite end of the mandrel is formed with a s0t 4 extending inward to some distance from the end of the mandrel, thisslot 4 being formed with an angular portion 5 and a short revertedportion 6. The mandrel is of suitable size to fit within the section ofhose 7 that Will be placed upon the mandrel and over the slotted end ofthe mandrel will he slipped a detachable retaining sleeve or collar 9that is provided with the inwardly projecting pin 10 adapted to enterthe slotted end of the mandrel. It will thus be seen that the sleeve orcollar 9 is detachably connected to the mandrel by a bent joint whichwill enable the cap to be readily laced in osition for use and easilywithrawn an which will securely retain the hose in position upon themandrel during the vulcanizing operation.

When the mandrel is to be used, a section of hose 7 will be slipped overthe mandrel until the end of the hose bears against the fixed collar 2.The detachable collar 9 will then be slipped over the slotted end of themandrel, the pin 10 passing along the slot 4 and by means of the collar9 the hose will be slightly compressed so as to permit the pin 10 topass by the angular portion 5 into the reverted portion 6 of the s ot,the elasticity of the hose serving to hold the pin 10 in the outer endof the slot 6. The pressure of the collars 2 and 9 upon the ends of thehose section will give to these ends a square shape and will prevent theescape of the rubber during the vulcanizing o eration. The slot in theend of the mandre and the pin 10 in the detachable cap 9 will determinewith exactness the length of the hose section. Thus for example, if inmaking sections for air brake hose the specifications call for sections22 inches long, then the distance between the inner ends of the collars2 and 9 (when the pin 10 of the collar 9 is at the end of the slot 6)will be exactly 22 inches. After the hose has been vulcanized, and thewrapper removed therefrom, the collar 9 can be easily withdrawn byforcing it inward slightly and turning it upon the mandrel so as topermit the pin 10 to pass from the open end of the slot 4.

It is obvious that the exact details set forth may be varied Withoutdeparture from the essentials of the invention.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

l. A vulcanizing mandrel for rubber hose comprising a cylindrical bodyhaving a fixed collar at one end and having at its opposite end a collarremovably encircling said mapldrel and detachably interlocked therewit2. A vulcanizing mandrel for rubber hose comprising a body having afixed collar at one end and having a detachable collar at its oppositeend, said detachable collar being connected by a bayonet joint to thebody of the mandrel.

HARRY L. OLAPP, KATHARINE GERLACEL'

